EP0322273B1 - Feuerfeste Verglasung und Verfahren zur Herstellung - Google Patents

Feuerfeste Verglasung und Verfahren zur Herstellung Download PDF

Info

Publication number
EP0322273B1
EP0322273B1 EP88403149A EP88403149A EP0322273B1 EP 0322273 B1 EP0322273 B1 EP 0322273B1 EP 88403149 A EP88403149 A EP 88403149A EP 88403149 A EP88403149 A EP 88403149A EP 0322273 B1 EP0322273 B1 EP 0322273B1
Authority
EP
European Patent Office
Prior art keywords
polyvinyl alcohol
solution
grams
process according
dialdehyde
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88403149A
Other languages
English (en)
French (fr)
Other versions
EP0322273A1 (de
Inventor
Gerhard Holzer
Udo Gelderie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Glass France SAS
Original Assignee
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vegla Vereinigte Glaswerke GmbH, Saint Gobain Vitrage International SA filed Critical Vegla Vereinigte Glaswerke GmbH
Priority to AT88403149T priority Critical patent/ATE73046T1/de
Publication of EP0322273A1 publication Critical patent/EP0322273A1/de
Application granted granted Critical
Publication of EP0322273B1 publication Critical patent/EP0322273B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/14—Macromolecular materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/069—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of intumescent material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31507—Of polycarbonate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31627—Next to aldehyde or ketone condensation product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31645—Next to addition polymer from unsaturated monomers
    • Y10T428/31649—Ester, halide or nitrile of addition polymer

Definitions

  • the invention relates to a fire-resistant glazing comprising at least two sheets of glass kept at a distance from each other and between which is placed a layer of an aqueous gel, the aqueous phase of which comprises at least one salt in solution and the solid gelling phase consists of a polymer.
  • Fire-resistant glazing of this type is known from French patent FR 2 346 548. During a fire, they operate in the following manner: the heat is first of all absorbed by the water from the aqueous gel. This heat is used to vaporize the water. Then, after vaporization of the water and combustion of the solid organic phase, the salt forms a frothy solid crust. This solid frothy crust remains, even in the presence of very high heat and constitutes a shield against overheating, which also prevents the penetration of heat rays. According to these basic principles, fire-resistant glazing is produced which is flame-retardant (class G of standard DIN 4102, 5th part of September 1977) or fire-resistant for 90 minutes (class of fire resistance F 90 according to DIN).
  • the constituent polymer of the gelling solid phase is a crosslinked derivative of polyacrylic acid, for example the amide of polyacrylic acid.
  • the invention sets itself the task of finding, as a constituent of the gel, a chemical system which fulfills all the requirements provided for a fire-resistant glazing of this type, such as, for example, transparency and absence of turbidity of the gel layer, high solubility of the salt, and complete solubility of the gelling compound in the water where the salt is dissolved, but in which however, no toxic or dangerous substance for health is used.
  • this mission will be accomplished by the use as a constituent polymer of the gelling solid phase, of a crosslinked polyvinyl alcohol.
  • fire-resistant glazing of the type described above based on cross-linked polyvinyl alcohol as a solid phase, meets all the requirements imposed on the product.
  • glazing even with a large thickness of gel, remains highly transparent, clear and colorless. It has also been shown that these characteristics do not change over time under the usual conditions of use.
  • the gels according to the invention are stable up to temperatures of 50 ° C. and above and also insensitive to cold up to -30 ° C.
  • the fire behavior corresponds to that of usual gel glazing.
  • the components of the gelable solution are perfectly harmless to health.
  • the fire-resistant glazing according to the invention does not contain any powerful oxidizing compound such as those necessary for the polymerization of acrylic acid derivatives, so that the risks of corrosion of the metal frame peripheral are significantly reduced.
  • the glazings in accordance with the invention can be produced from various basic products.
  • basic products consisting of polyvinyl alcohol with an average molar mass of between 18,000 and 224,000 grams / mole and a hydrolysis rate of 75 to 100 mole percent.
  • Polyvinyl alcohols of this type are soluble in water.
  • the hydrolysis rate increases the higher the temperature at which the dissolution is carried out.
  • polyvinyl alcohols with a hydrolysis rate of 98 to 100 mole percent require during the dissolution of the temperatures higher than 90 ° C.
  • Polyvinyl alcohols can be crosslinked from the gelable solution by adding different materials to the solution.
  • bifunctional aldehydes are suitable for the crosslinking reaction. This is the case, in particular, of glutardialdehyde, terephtaldialdehyde and glyoxal. A common requirement for all these compounds is obviously their solubility in water and even in the solution comprising salt and polyvinyl alcohol.
  • the concentration of polyvinyl alcohol and of aldehyde-based compounds must be chosen so that, on the one hand, the gel obtained has the desired properties such as hardness, consistency, turbidity, and polymerization shrinkage and that on the other hand, crosslinking does not occur too quickly so that there is sufficient time for the manufacture and implementation of the gelable solution.
  • a last condition which concerns the concentrations must be fulfilled, that which concerns the viscosity, it must be sufficiently low so that the solution can satisfactorily fill the hollow parts of the multiple glazings.
  • the concentration of polyvinyl alcohol in the aqueous solution must be chosen in such a way that, with a polyvinyl alcohol of average molar mass of approximately 18,000 grams / mole, it does not exceed 40%. weight. For an average molar mass of 224,000 grams / mole, we will limit our to a maximum of 10% by weight.
  • the crosslinking reaction can be obtained satisfactorily provided that the pH value is between 2.5 and 5. This can be obtained by adding to the system adequate amounts of an acid compatible with the solution or even by adding a compatible acid salt. It would be possible to obtain the crosslinking reaction even without using acid causing the catalysis, nevertheless the use of an adapted pH value makes it possible to reduce the reaction time appreciably.
  • the nature and quantity of the salt responsible for ensuring the main part of the fireproofing function of the glazing must be chosen as a function of their compatibility with the rest of the chemical system.
  • calcium chloride and magnesium chloride are particularly well suited whereas, for example, sodium chloride is hardly compatible with the solution.
  • Polyacid salts such as Na commeSO4 have been found to be incompatible with polyvinyl alcohols.
  • the production of the gelable solution takes place in principle in the following manner: one begins by dissolving the polyvinyl alcohol which is introduced into the water in the form of powder or granules at the desired concentration. Dissolution occurs at an elevated temperature of the order of 90 ° C with continuous stirring. After about 40 minutes, the polyvinyl alcohol is completely dissolved. The salt is then added to the solution in a suitable quantity and the mixture is stirred until complete dissolution. Another method is to start by dissolving the salt in water or even dissolving salt and polyvinyl alcohol simultaneously. All of these solutions occur at elevated temperatures and with continuous agitation. Finally, just before filling the space of the multiple glazing with the gelable solution, the dialdehyde and the catalyst acid are introduced in suitable quantities therein.
  • the solution thus prepared After carrying out a careful homogenization of the solution thus prepared, it is introduced into the space between the glass sheets.
  • the glazings thus filled are then subjected to a temperature of 50 to 70 ° C. at which the mixture polymerizes in times which depend on the composition and are between 2 and 15 hours.
  • This solution which contains a mixture of polyvinyl alcohol and salt, is then added dropwise to an aqueous solution of hydrochloric acid at 10% by weight of such so that the pH of the mixture is 3.2. After sufficient homogenization, the mixture is introduced into the space of an insulating glazing and allowed to gel for 3 hours at 50 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Special Wing (AREA)
  • Glass Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Claims (8)

1. Feuerwiderstandsfähige Verglasung aus wenigstens zwei auf Abstand zueinander gehaltenen Glasscheiben, zwischen denen eine Schicht aus einem Hydrogel angeordnet ist, dessen wässrige Phase wenigstens ein gelöstes Salz enthält und dessen gelbildende feste Phase aus einem Polymer besteht, dadurch gekennzeichnet , daß das die feste Phase des Gels darstellende Polymer ein vernetzter Polyvinylalkohol ist.
2. Verfahren zur Herstellung einer feuerwiderstandsfähigen Verglasung nach Anspruch 1, bei dem der von zwei Glasscheiben und einem zwischen diesen am Rand angeordneten Abstandshalterahmen gebildete Zwischenraum mit einer ein gelöstes Salz und eine gelbildende Komponente enthaltenden wässrigen Lösung gefüllt wird, dadurch gekennzeichnet, daß als gelbildende Komponente Polyvinylalkohol mit einer mittleren Molmasse von 18 000 g/mol bis 224 000 g/mol , sowie ein die Vernetzung bewirkender Dialdehyd verwendet wird.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß als die Vernetzung bewirkender Dialdehyd Glutardialdehyd, Terephthaldialdehyd und/oder Glyoxal verwendet wird.
4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der wässrigen Lösung eine katalysierende Säure und/oder ein hydrolytisch wirkendes saures Salz zugesetzt wird.
5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Konzentration der Lösung des Polyvinylalkohols bei einer mittleren Molmasse des Polyvinylalkohols von 18 000 g/mol 3 bis 40 Gew.-%, und bei einer mittleren Molmasse des Polyvinylalkohols von 224 000 g/mol 1 bis 10 Gew.-% beträgt.
6. Verfahren nach einem oder mehreren der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass Glutardialdehyd in einer Menge zugesetzt wird, daß das Molverhältnis von Polyvinylalkohol zu Glutardialdehyd 1/1 bis 1/10, und vorzugsweise 1/5 beträgt.
7. Verfahren nach einem oder mehreren der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß das Terephthaldialdehyd in einer Menge zugesetzt wird, daß das Molverhältnis von polyvinylalkohol zu Terephthaldialdehyd 1/1 bis 1/100, und vorzugsweise etwa 1/10 betraegt.
8. Verfahren nach einem oder mehreren der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß als wasserlösliches Salz MgCl₂ und CaCl₂, jeweils allein oder in Mischung miteinander, verwendet wird.
EP88403149A 1987-12-15 1988-12-12 Feuerfeste Verglasung und Verfahren zur Herstellung Expired - Lifetime EP0322273B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88403149T ATE73046T1 (de) 1987-12-15 1988-12-12 Feuerfeste verglasung und verfahren zur herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717467A FR2624546B1 (fr) 1987-12-15 1987-12-15 Vitrage antifeu et procede de fabrication
FR8717467 1987-12-15

Publications (2)

Publication Number Publication Date
EP0322273A1 EP0322273A1 (de) 1989-06-28
EP0322273B1 true EP0322273B1 (de) 1992-03-04

Family

ID=9357870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88403149A Expired - Lifetime EP0322273B1 (de) 1987-12-15 1988-12-12 Feuerfeste Verglasung und Verfahren zur Herstellung

Country Status (7)

Country Link
US (1) US4983464A (de)
EP (1) EP0322273B1 (de)
JP (1) JP2606911B2 (de)
AT (1) ATE73046T1 (de)
DE (2) DE3838806A1 (de)
ES (1) ES2032590T3 (de)
FR (1) FR2624546B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061748A (en) * 1990-06-28 1991-10-29 Artistic Glass Products Company Fire resistant windows
JP2584200Y2 (ja) * 1992-02-06 1998-10-30 セントラル硝子株式会社 ゲル入り防火ガラス体
JP3169148B2 (ja) * 1992-09-30 2001-05-21 三井化学株式会社 防火ガラス
US5908704A (en) * 1997-06-30 1999-06-01 Norton Performance Plastics Corporation Interlayer film for protective glazing laminates
WO2003061963A1 (de) * 2002-01-24 2003-07-31 Flamro Brandschutz-Systeme Gmbh Brandschutzverglasung und brandschutzfenster sowie verfahren zur herstellung einer brandschutzzusammensetzung und einer brandschutzverglasung
US6987355B2 (en) * 2003-06-11 2006-01-17 Eastman Kodak Company Stacked OLED display having improved efficiency
GB0917905D0 (en) * 2009-10-13 2009-11-25 Pilkington Group Ltd Fire resistant glazing
GB2500368A (en) * 2012-02-22 2013-09-25 C G I Internat Ltd Fire resistant glazing unit with hydrogel interlayer
WO2017137148A1 (de) 2016-02-08 2017-08-17 Raschig Gmbh Brandschutzgel
GB201906236D0 (en) * 2019-05-03 2019-06-19 Advanced Hydradtion Tech Ltd Manufactured aggregate

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB337806A (en) * 1929-08-06 1930-11-06 Ig Farbenindustrie Ag Improvements in the manufacture and production of artificial masses
BE421358A (de) * 1934-08-29 1900-01-01
US2425568A (en) * 1942-03-21 1947-08-12 Libbey Owens Ford Glass Co Laminated safety glass
FR1284526A (fr) * 1959-09-28 1962-02-16 Verre à plusieurs couches comportant des couches intermédiaires constituées par des polymères
US3249487A (en) * 1963-10-23 1966-05-03 Monsanto Co Safety laminates
US3396074A (en) * 1965-08-03 1968-08-06 Monsanto Co Laminated safety glass
US3484157A (en) * 1965-10-23 1969-12-16 American Optical Corp Abrasion-resistant optical element
US3963849A (en) * 1971-11-01 1976-06-15 Thompson Chemicals, Inc. Fireproof product using magnesium oxychloride cement
DE2161645A1 (de) * 1971-12-11 1973-06-14 Roehm Gmbh Beschlagverhinderndes beschichtungsmittel
DE2228299C3 (de) * 1972-06-09 1985-11-14 Saint-Gobain Industries, Neuilly-sur-Seine Sicherheitsglasscheibe
US4071649A (en) * 1973-03-30 1978-01-31 Glaverbel-Mecaniver Fireproof glasswork
GB1451932A (en) * 1973-09-17 1976-10-06 Glaverbel Fire resistant panels
GB1451933A (en) * 1973-09-17 1976-10-06 Glaverbel Fire resistant panels
DE2457037B2 (de) * 1974-12-03 1976-09-16 Flachglas Ag Delog-Detag, 4650 Gelsenkirchen Verglasungseinheit, insbesondere isolierglasscheibe, fuer brandschutzzwecke
GB1562791A (en) * 1975-08-22 1980-03-19 Bfg Glassgroup Lighttransmitting fire-screening panels
FR2346548A1 (fr) * 1976-03-30 1977-10-28 Saint Gobain Vitrage multiple anti-feu, comportant une couche intercalaire de gel
US4105708A (en) * 1976-09-07 1978-08-08 American Cyanamid Company Dimethoxymethyl diethoxymethyl glycoluril and coating compositions containing the same as a cross-linking agent
US4137364A (en) * 1976-11-05 1979-01-30 Monsanto Research Corporation Transparent laminate and adhesive film
GB1604388A (en) * 1977-08-03 1981-12-09 Bfg Glassgroup Fire screening panels
FR2405905A1 (fr) * 1977-10-11 1979-05-11 Saint Gobain Vitrage pare-feu a gel aqueux
JPS5548227A (en) * 1978-08-28 1980-04-05 Takashi Ishikawa Fire- and heat-resistant synthetic resin product
GB2029837B (en) * 1978-09-18 1982-10-13 Statni Vyzkumny Ustav Material Fire resistant material
US4407897A (en) * 1979-12-10 1983-10-04 American Can Company Drying agent in multi-layer polymeric structure
GB2085899B (en) * 1980-10-11 1985-01-23 Powell Ronald Flame retardant composition
DE3039386A1 (de) * 1980-10-18 1982-05-27 Hoechst Ag, 6000 Frankfurt Verfahren zur veraenderung des wassergehalts von wasseraufnehmendem oder wasserabweisendem material
GB2104838B (en) * 1981-08-28 1985-02-20 Glaverbel Fire-screening panel
DE3506134A1 (de) * 1985-02-22 1986-08-28 Flachglas AG, 8510 Fürth Glasbauelement mit brandschutzfuellung
US4681810A (en) * 1985-12-23 1987-07-21 Monsanto Company Fire-resistant interlayer
US4753845A (en) * 1986-01-30 1988-06-28 Kyoraku Co., Ltd. Multi-layer polymeric structure

Also Published As

Publication number Publication date
ES2032590T3 (es) 1993-02-16
FR2624546B1 (fr) 1993-11-26
DE3868898D1 (de) 1992-04-09
ATE73046T1 (de) 1992-03-15
EP0322273A1 (de) 1989-06-28
DE3838806C2 (de) 1990-05-17
DE3838806A1 (de) 1989-06-29
JPH01264942A (ja) 1989-10-23
FR2624546A1 (fr) 1989-06-16
JP2606911B2 (ja) 1997-05-07
US4983464A (en) 1991-01-08

Similar Documents

Publication Publication Date Title
EP0322273B1 (de) Feuerfeste Verglasung und Verfahren zur Herstellung
EP0442768B1 (de) Feuerwiderstandsfähige Verglasung und Herstellungsverfahren
EP0214056B1 (de) Feuerwiderstandsfähige Verglasung
CA1239726A (fr) Resine pour une composition d'encollage, son procede de fabrication et la composition d'encollage obtenue
US4202411A (en) Acid soluble coating for well screens
FR2463110A1 (fr) Composition explosive du type en emulsion et procede pour sa preparation
FR2518896A1 (fr) Procede d'obtention de compositions d'hydrocarbures gelifies, compositions obtenues et leur utilisation dans la fracturation hydraulique des formations souterraines
EP0324681B1 (de) Wasserbeständiges brennbares Agglomerat, Verfahren zu seiner Herstellung und Zusammensetzung der im Verfahren verwendeten Materialien
FR2487344A1 (fr) Emulsion aqueuse stable de peroxydes organiques
US4293440A (en) Temperature gelation activated aqueous silicate mixtures and process of forming impermeable gels
FR2504544A1 (fr) Composition pouvant impartir, a des systemes aqueux, une combinaison de pseudoplasticite et de controle de perte de fluide, et procede d'utilisation
FR2704219A1 (fr) Nouvel alcool polyvinylique (PVA) réticulé chimiquement, son procédé de synthèse et ses applications comme agent de contrôle du filtrat dans les fluides pétroliers.
US4239084A (en) Acid soluble coating for well screens
EP0425521A1 (de) Verfahren zur Anwendung eines Gels in Bohrlöchern.
CH496472A (fr) Procédé de préparation de petites capsules polymères
CA2032986C (fr) Procede et composition pour la reduction selective de la permeabilite a l'eau dans les reservoirs d'hydrocarbures chauds et sales
CH640543A5 (fr) Gommes de caroube phosphatees.
RU2052075C1 (ru) Гелеобразующий состав
RU2115420C1 (ru) Твердое вещество для приготовления окислительного раствора и способ его получения
CA1070936A (en) Oil well grouting with temperature activated aqueous silica gel
FR2484434A1 (fr) Solution aqueuse concentree de phenol et de formaldehyde stable a basse temperature et procede pour sa preparation
FR2816954A1 (fr) Solution aqueuse boree, realiser a partir d'un compose d'acide borique et de carbonate de sodium
EP0067093A1 (de) Verfahren zur Behandlung von phosphidischen Schlacken
US5739183A (en) Colorless, non-toxic, stabilized aqueous solution of a C1 -C5 alkyl vinyl ether and maleic acid copolymer
JP3869501B2 (ja) Ｃ１ 〜ｃ５ アルキルビニルエーテルとマレイン酸コポリマーの無色の非毒性安定水溶液

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19890902

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SAINT-GOBAIN VITRAGE INTERNATIONAL

Owner name: VEGLA VEREINIGTE GLASWERKE GMBH

17Q First examination report despatched

Effective date: 19910715

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 73046

Country of ref document: AT

Date of ref document: 19920315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3868898

Country of ref document: DE

Date of ref document: 19920409

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2032590

Country of ref document: ES

Kind code of ref document: T3

26N No opposition filed
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 88403149.3

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030111

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040701

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20071212

Year of fee payment: 20

Ref country code: NL

Payment date: 20071125

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20071212

Year of fee payment: 20

Ref country code: CH

Payment date: 20071213

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20071205

Year of fee payment: 20

Ref country code: BE

Payment date: 20071219

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080118

Year of fee payment: 20

Ref country code: FR

Payment date: 20071212

Year of fee payment: 20

Ref country code: GB

Payment date: 20071212

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071228

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

BE20 Be: patent expired

Owner name: *SAINT-GOBAIN VITRAGE INTERNATIONAL

Effective date: 20081212

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20081211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081212

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20081213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081211